K 10
svn:author
V 7
davidxu
K 8
svn:date
V 27
2010-11-17T13:52:09.619467Z
K 7
svn:log
V 277
In mutex_try_lock, use _mutex_owned() to simply code, this also
fixed some bugs which ignored recursive mutex.
In mutex_unlock_common, check recursive mutex correctly.
If kernel returned EOWNERDEAD, clear mutex's left-over recursive
count, so we can correctly unlock it later.

END